Oscar Pistorius in court: Defense exposes cracks in police evidence

In the second day of Oscar Pistorius' bond hearing regarding the death of his girlfriend, Reeva Steenkamp, the Olympian described in detail what happened the night of her shooting. NBC's Michelle Kosinski reports and former prosecutor Star Jones discusses the case.

By Rohit Kachroo, Michelle Kosinski and Alastair Jamieson, NBC News

PRETORIA, South Africa -- Defense lawyers exposed apparent weaknesses in the police evidence against Oscar Pistorius Wednesday as a court heard more dramatic details of the night he fatally shot his girlfriend.

The Olympic and Paralympic athlete stared fixedly at the floor, sobbing occasionally, as a senior investigator described the scene when officers arrived at his home in Pretoria in the early hours of Valentine's Day.

Dubbed the "Blade Runner," Pistorius maintains he fired into his locked bathroom in a panic over a possible prowler. However, prosecutors say he put on his artificial legs and stalked Steenkamp to the bathroom to kill her.

Warrant Officer Hilton Botha, an experienced detective, testified that a witness heard shouting for an hour coming from the house shortly before the shooting.

Another witness heard gunshots, saw lights on in the house, heard a woman screaming two or three times, then heard another few shots, Botha said.

But under cross-examination, Botha admitted one of the witnesses was 1,000 feet away from the house at the time.

Botha told the court that needles and testosterone were found in the athlete's bedroom.

The double-amputee's defense lawyer Barry Roux disputed that claim, saying the substance was in fact a herbal remedy and that police had misread the label. State prosecutor Gerrie Nel also had to correct Botha when he initially called the substance "steroids."

Botha said Steenkamp's body was clothed and covered in towels, and that one bullet cartridge was discovered in the hallway of Pistorius' home, with three more found in the bathroom. A firearm was found on the shower mat.

The investigator said he wanted to charge Pistorius with possession of unlicensed ammunition, according to Reuters.